Wiring an Avel Transformer to a BrianGT PS - need help - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 12th July 2005, 10:59 PM   #1
diyAudio Member
 
Join Date: May 2005
Location: Seattle, WA, USa
Default Wiring an Avel Transformer to a BrianGT PS - need help

Hi,
Can someone talk me through this? I'm very new to this electronics things and I would like a little help wiring my toroidal transformer into the power supply so I don't electrocute myself. I'm using an avel 250 25v transformer from parts express and BrianGT's snubberized power supply, a simple 3 prong AC Chassis plug, and a simple fuse. So... can someone help me wire this thing.

The transformer has 8 wires and this is the schematic on the side:
Blue -
Black - 0v
Gray - 2x115v
Red - 25v / 5.00A
Violet -
Orange - 0v
Brown -
Yellow - 25v / 5.00A

Where do I connect each of these wires? I'm not sure where to get a straightforward description.

Thanks,
Alex
  Reply With Quote
Old 12th July 2005, 11:41 PM   #2
diyAudio Member
 
velmeran42's Avatar
 
Join Date: Jan 2005
Location: Issaquah, WA
Default Look a little like this?

Click the image to open in full size.

I also happen to have an Avel torroid from Partsexpress and one of Brian's Snubberized PSUs (and live in Seattle for that matter). I haven't done the final wiring on mine yet since I'm still fabricating the chassis.

Click the image to open in full size.

I believe you need to wire the blue and violet to neutral, grey and brown to live, and then just wire up each of the 25v pairs to the terminals on the PSU. I'm a noob so I could be off, but I'm sure someone will correct me.

Good luck
  Reply With Quote
Old 13th July 2005, 02:06 AM   #3
homer09 is offline homer09  Canada
diyAudio Member
 
homer09's Avatar
 
Join Date: Jan 2004
Location: Montreal
Help Wiring Toriodal Primaries
__________________
Most people wouldn't know good music if it came up and bit them in the ***. - Frank Zappa
  Reply With Quote
Old 13th July 2005, 06:32 PM   #4
diyAudio Member
 
Join Date: May 2005
Location: Seattle, WA, USa
Default Is this right?

Thanks for the help and thanks for the link homer09. Here's a test run. I need to put the fuse in line with the grey wire, right?

Velmeran42, email me, I'd like to ask a question or two about your chassis design. amorrow -((at))- u . washington . edu
Attached Images
File Type: jpg wiringjpeg.jpg (95.1 KB, 335 views)
  Reply With Quote
Old 13th July 2005, 07:15 PM   #5
Banned
 
Join Date: Jan 2005
WRONG!!! for 115vac, tie blue and violet together and run to live, and gray and brown together and run to neutral AND NOT THE SAFETY GROUND!! The safety ground should go to the chassis.
  Reply With Quote
Old 13th July 2005, 07:18 PM   #6
diyAudio Member
 
BobEllis's Avatar
 
Join Date: Sep 2003
Location: Upstate NY
not quite - tie your blue and violet wires together. connect them to your fuse and the fuse to the hot lead of the IEC input (put a switch in this line unless you want to be on all the time) connect your gray and brown wires together and then to the cold side of your IEC.

blue
. >--- fuse --- switch ---hot lead
violet

gray
. >-----cold lead
brown

Use insulated terminals to make the connections, as a soldered joint could potentially fail and allow the hot lead to contact the chassis.
  Reply With Quote
Old 13th July 2005, 07:29 PM   #7
Banned
 
Join Date: Jan 2005
IŽd use a double (two in one) switch to cut both hot and neutral, safer and generates less noise in the amp when flipped on/off.
  Reply With Quote
Old 13th July 2005, 07:39 PM   #8
homer09 is offline homer09  Canada
diyAudio Member
 
homer09's Avatar
 
Join Date: Jan 2004
Location: Montreal
Dont connect what your showing in the picture!

i hope my picture is clear.


Now if make sure your power cable is also wired correctly. your fuse should be inline with the right hole in your wall socket (the smaller one, its smaller because its the hot, so your finger doesnt fit as easily )

connect your power plug to your chasis, dont plug to the wall, and check with a DMM that there is a connection between the fuse and the hot prong, this is very important, a fuse inline with neutral is useless.

On my picture,

H is Hot
N is Neutral
G is Ground (connected to the star ground, not to your transformer!)

Notice the lines over the AC1 and AC2, these are like on Brian's board, match them.

For best noise reduction, twist together the red&black, orange&yellow, blue&grey, brown&purple. Make sure there is no electrical contact between twisted wires as they will cause a short.

If you have a doubt about anything, ask, this could get ugly if you dont. maybe even take another picture with everything wired right before you plug in for the first time.


EDIT: i see i took too long to make my picture and u got your answers already...
Attached Images
File Type: gif power.gif (5.5 KB, 393 views)
__________________
Most people wouldn't know good music if it came up and bit them in the ***. - Frank Zappa
  Reply With Quote
Old 13th July 2005, 08:22 PM   #9
diyAudio Member
 
Join Date: May 2005
Location: Seattle, WA, USa
Default Whew, Tragedy narrowly averted

Thank you for all saving me from certain death. Your directions are all quite helpful.
I'll take a picture and post it before I turn it on.
  Reply With Quote
Old 14th July 2005, 06:57 PM   #10
diyAudio Member
 
velmeran42's Avatar
 
Join Date: Jan 2005
Location: Issaquah, WA
So have you turned it on yet? (and are you alive still?). Just wondering.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
FS: Avel 625VA 30V+30V Transformer mfb Swap Meet 1 12th July 2007 06:59 PM
Avel Lindberg 25-0-25 625VA transformer cotdt Swap Meet 1 1st May 2007 04:54 AM
Briangt LM3875 wiring question ransom peek Chip Amps 9 22nd May 2006 06:35 AM
Avel Transformer Part # Y236852 - 35V X 2 625 VA (Last One!) Michael Rothacher Swap Meet 0 26th October 2005 09:03 PM
FS: Avel Toroidal Transformer. 1000VA 25+25 acliao Swap Meet 0 29th November 2004 09:46 PM


New To Site? Need Help?

All times are GMT. The time now is 03:27 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2